Tractor with hydraulic drive



May 23, 1944.

J. O. HAMREN TRACTOR WITH HYDRAULIb DRIVE Filed April 19, 1941 e Shets-Sheet 1 INVENTO'R J05EPH-O. HAMREN KW ATTORNEY May 23, 1944.

J. o. HAMREN TRACTOR WITH HYDRAULIC DRIVE. I

Filed April 19, 1941 6 Sheets-Sheet 2 n yw. R 5/ M mm mm m 5 w m A M R u wu I. v Q \\x L k BNN. K WV W .E \M N .w m/a. NM \R V k m J m m N 9 Row 1 MR w QR l H x k I QR) I .1 NM 2: ll IQ u n q w%. 1 w l H m I N n 1 1 i H v M an E; Fl1|llh| l u lllllm m E W 1 n w m & I I W a m i aw w WK awn q. mm. SQ c v v s) N 5 LN y 1944- J. o. HAMREN 2,349,265

TRACTOR WITH HYDRAULIC DRIVE Filed April 19, 1941 6 Sheets-Sheet 5 INVENTOR ATTORNEY May 23, 1944. A R 2,349,265

TRACTOR WITH HYDRAULIC DRIVE v Filed April 19, 1941 6 Sheets-Sheet 4 M y 1944; J. Q HAMREN 6 TRACTOR WITH HYDRAULIC DRIVE Filed April 19, 1941 6 Sheets-Sheet 5 Jimm /f) May 23, 1944. I

J. o H AMREN TRACTOR WITH HYDRAULIC DRIVE Filed April 19, 1941 6 Sheets-Sheet 6 I IIHHII I um fiw Q IN V EN TOR.

5 Z 01% m W Patented May 23, 1944 FFICE 'riu c'roa wrm r r RAUHC DRIVE 18 Claims.

This invention relates to an automotive vehicle and while the invention is applicable. to many types of automotive vehicles, it is particularly designed for and illustrated for use with a tractor.

It is an object of this invention to provide a tractor having a frame, driving wheels, an internal combustion motor mounted on said frame and a difi'erential gearing for said wheels together with a fluid pump connected to said motor and a fluid operated motor driven by fluid under pressure from said pump and having a driving shaft connected to said differential gearing.

It is a further object of the invention to provide such tractor assembly as set forth in the preceding paragraph in which said pump is directly connected to said internal combustion motor and said fluid operated motor is disposed between said pump and said differential gearing.

It is also an object of the invention to provide such a traction assembly as set forth above. said pump having a driving shaft directly connected to said internal combustion motor said fluid operated motor having a driving shaft, a casing'between said pump and fluid operated motor having bearings therein for said shafts, said shafts being coaxial and a casting between said fluid operated motor and differential gearing having a bearing for said driving shaft of said fluid operated motor, a pinion being secured to said last mentioned driving shaftconnected to and driving said differential gearing.

It is a further object of the invention to provide an automotive vehicle such as a tractor having a frame, on internal combustion motor mounted on said frame and driving wheels together with a pump connected to said motor, a fluid operated motor mounted on said frame driven by fl'uid under pressure from said pump and having a driving shaft connected to said dif-. ferential gearing, a second fluid operated motor mounted on said frame and driven by fluid under pressure from said pump and a service pulley driven by said last mentioned fluid operated moton.

It is still another object of the invention to provide an assembly as set forth in the preceding paragraph together with means for driving either of said fluid operated motors at will and for driving said first mentioned fluid operated motor in either direction to give forward and rearward speeds.

Another object of the invention is to provide a structure and arrangement of fluid pump and fluid operated motor or transmission device which can be placed on tractors now in use or which can bereadily placed on new tractors.

These and other objects and advantages of the invention will be fully set forth in the following description made in connection with the accompanying drawings in which like reference characters refer to similar parts throughout the several views and in which;

Fig. l is a plan .view of a tractor having the invention applied thereto;

Fig. 2 is a view partly in side elevation and partly in vertical section of a portion of the device, some parts being broken away;

Fig. 3 is a vertical section taken substantially on line 3-3 of Fig. 7 as indicated by the arrows;

Fig. 4 is a vertical section taken substantially on line d4l of Fig. 7 as indicated by the arrows, some parts being broken away;

Fig. 5 is a view in vertical section taken substantially on line 5-5 of Fig.- 7 as indicated by the arrows;

Fig. 6 is a vertical section taken substantially on line d-& of Fig. 7;

Fig. 7 is a partial horizontal section taken substantially through the axes of the driving shaft of the fluid operated motors; V I Fig. 8 is a partial view partly in side elevation and lyin vertical section of the pump;

Fig. 9 is a vertical section taken substantially on line 9-9 of Fig. 2 as indicated by the arrows; .and

Fig. 10 is a partial plan view showing the modifled arrangement of the device.

Referring to the drawings, an automotive vehicle of the tractor type is shown comprising a frame ii, a front axle it on which are mounted the front wheels 'il, rear axle housings it in which are disposed axles on which are mounted the driving wheels 99. A differential mechanism for the wheels i9 and their axles, the usual type employed in tractors, is disposed in the housing between axle housings i8 and comprises a spur gear (not shown) driven by a pinion on the same axis as a driving bevelled gear 20 shown in Fig. 2. Certain steering connections of the front wheels are shown as 2| which are connected to the usual steering wheel 22. A 'motor 24 of the usual internal combustion type is mounted on the front of the tractor frame and said motor has a crank shaft which is connectedto. a fly wheel 24a shown in Fig. 2 and which forms the rotating driving element of said motor. A portion of the usual motor housing of the tractor is shown as 25. In accordance with the present invention, a ring 26 which may be a casting is provided, and this will be flnished'at its front end to flt and be connected to the housing 25 of the tractor motor. At its rear end ring 26 will be finished so as to be fitted to and connected to a pump housing or casting 21. As shown in Fig. 2, housing 25 is rabbeted to receive ring 26 and housing 21 is rabbeted or shouldered to receive said ring. Members 25, 26 and 2! are connected by a plurality of circumferentially spaced headed bolts 28. Housing 21 at its rear end has a flange Zlffltting against a ring 30 and being connected thereto by a plurality of circumferentially spaced headed bolts 3|, said bolts being shouldered into a flange 32a or into lugs 32b of a housing 32 of a fluid operated motor or transmission device. Ring 30 encloses a casting 21a forming one end plate of pump housing 21. Said member 21a is connected to housing 21 by a plurality of circumferentially spaced headed bolts 33 and has a central hub in which is disposed a bearing 3t for the shaft 35 which constitutes the driving shaft for pump P. A plate or'casting 21b forms the other end plate for housing 2? and is connected to the latter by a pluralityof circumferentially spaced headed bolts 38. Plate 211) has a central hub in which is disposed a bearing 3i for shaft 35, bearingsdd and 31! being shown as of the ball bearing type. A sealing ring 38 is disposed at the outer end of bearing 3? in plate 21?) and said plate is provided with a recess Zlc adapted to receive packing, which recess is covered by a plate 38 secured to the end of plate Zlb by screws it and surrounding shaft 35. Member 2 30; has a central hub and the end of shaft 35 is disposed in this hub and keyed thereto by a plurality of keys. Said shaft 35 has splined and secured thereto a driving member 42 which extends between bearings 3d and 37! and has a central flange with a cylindrical periphery. End plate 212) has an inner annular flange 27d forming in said'plate an annular chamber Z'ie. End plate Zia has an inner annular flange Zlgforming in said plate an annular chamber 2771.. Chambers'file and 21h communicate with a passage Zllp extending longitudinally of easing El as shown in Fig. 2. End plates 53 of similar construction are disposed at the ends of the said pump and have flat surfaces engaging the flanges 27d and 219, said end plates 43 having secured thereto by circumferentially spaced screws M a cylindrical casing 65, the heads of screws 416 being countersunk therein. A cylindrical casing Qt surrounds and fits against casing A l, the same having outwardly extending flanges Mia fitting against the cylindrical bore in housing member 2?, said latter flanges and the ends of housing 45 also fit at their ends into annular recesses formed in the flanges 21d and 21g and casing 35 is held in position by dowel pins tl extending into flanges 21d and 21g. The central flange of member 52 has secured therein studs 48. These studs have collars thereon fitting against the studs of said flange and have unthreaded portions adjacent said collars extending some distance into said flange. Pins or studs '38 extend in opposite directions'from said flange and are in staggered relation at opposite sides thereof. The end plates 63 are provided with annular grooves in which are disposed rings 56. Pins or studs 48 have reduced portions extending into said rings and circumferentially spaced screws i extend. through. said rings into said studs, the heads of said screws being countersunk in said rings. The studs or pins 48 have pivotally .lugs 524 which engage with the peripheral surface of a cam member 53. It will be understood that there are a series of vanes 52 at each side of the central flange of member 42 and there is a cam member 53 at each side of said central flange. Cam members 53 are respectively secured to the plates 43 by a plurality of headed 1 screws 54 threaded into said plates and having their heads countersunk in said cams. As shown in Fig. 9, the cam 53 extends eccentrically to the hub of member 62 and shaft 35 and has opposite similar sides each substantially 180 degrees in extent. The innermost end of each of said sides is adjacent the outermost end of the other side and said cam between said ends has openings 53a therethrough which communicate with the chamber 53b within said cam which extends about the hub of member 32. As shown in Fig. 2, chamber 531; communicates at its ends with chambers 21c and Hit. It will be noted that flanges 46a form a chamber 212' between housing member 21 and the circular casing 46. Passages 217' extend from chamber 21c through flanges 21d and are adapted at times to register with passages 46b in flanges Ma and thus connect chambers 21c and 41h with chamber 212'. Cylindrical members 45 and 36 have openings i250 and 460 therethrough and casing 36 is revoluble about casing 45 to bring these openings into the desired relative positibns. These ports or openings as shown in Fig. 2 are in the form of circumferentially extending comparatively narrow slots and there is one at each.

side of the central flange of member 62. To rotate casing 56 the same has secured thereto a curved rack 55 secured at its ends by screws 51 having their heads countersunk therein. Said rack has .meshed therewith a pinion 58 secured to a shaft 5& extending through a boss 27k on housing 21 and through a packing gland 66, the same having a nut 59a illustrated as of hexagon shape. Packing can be. disposed in the bore of 'boss 21k at the inner end of the gland 6G. Shaft 5% has secured thereto beneath nut 59a an arm 6!, which arm is pivotally connected at its other end by the headed and nutted bolt 62 between the forked ends of a link 63 which extends rearwardly at the top of the tractor frame and is provided with a handlefita adapted to be grasped by the operator.

upper and lower sides through which extend I duit 67! and 68' are bolted to the bosses 21m respectively and conduit 68 is curved and extends to an inlet member or conduit 69, said members having mating flanges 68a and 69a connected by the .circumferentially spaced headed and nutted bolts W. Member 89 supplies fluid under pressure to the fluid operated motor or transmission member designated generally as TM. Conduit 81 extends to and is bolted to the housing of a fluid operated motor designated generally as SM, said conduit having a flange bolted to said housing by the circumferentially spaced headed and nutted bolts 12. The said transmission member or Housing member 27 has bosses 21112 at its plication S. N. 376,626, filed January 31, 1941.

Said motor TM has'the housing member 32 already referred to and this is provided with a flange 320 at the end opposite pump P, said flange being bolted by bolts I3 to-a housing or casing H which extends to andwill be connected to the differential housing of the tractor. This member WI can be constructed as shown to be connected to one end of motor TM and can be varied at its other end to fit on and be connected to the particular tractor to be supplied with the transmission. An end plate or casting 32d is enclosed in the member 30, the same being similar to member 2111 but facing in a reverse direction.- Member 32d is connected to housing member 32 by circumferentially spaced bolts I6. Member 32d has a central hub in which is carried another bearing St in which is journaled the rotor shaft TI of motor TM. Another end plate 32c is provided sunk in said casing. A bearing 99 is carried at the center of ring 91 in which shaft I1 is journaled. Ring 91 divides the chamber in casing I3 between end plates 82 into two chambers of equal size and similar mechanisms are disposed in these clutch member 100 splined to and thus slidable on at the end of housing 32 opposite end plate 32d cumferentially spaced bolts I8. Member 32c has a central hub in which is disposed abearing I9 in which shaft TI is also joumaled. A sealing ring 66 is disposed at the outer side of bearing 13 about shaft TI and member 32c is provided with a recess 32f adapted to receive packing and this recess is covered by a plate 8| bolted to the outer end of member Me which surrounds shaft TI. Members 32d and 32e have inner annular flanges 32g and 32h respectively and said members have formed thereinchambers- 321' and 327' respectively. End plates 32 fit against the inner sides of flanges 32g and 32h respectively, said plates being of cylindrical form, the same being disposed in the ends of a cylindrical casing 83 which extends therebetween. Casing 33 is bolted to said plates by circumferentially spaced bolts 84 having their heads countersunk in said casing. The end members 32d and 32e have annular recesses formed therein and casing 83 extends into the inner porits end flanges from casing 32 to form a chamber 32g with which the passage in member 69 communicates. Casing 86 is adapted to be oscillated and for this purpose has secured thereto 'a rack 38 secured by screws 89 having heads countersunk therein. A pinion 90 meshes with rack 88, which pinion is secured to a shaft 9| extending centrally through a boss 321' on housing 32. Boss 321- is bored to provide a recess about shaft 9! for receiving packing and a gland 92 flts in said bore about shaft 9| to engage said packing. Shaft 91 is provided at its outer end with a nut- 9310ctween which a gland 92 is secured and lever 94 .to the opposite ends of which are connected links 95, the same extendingto a point adjacent the steering wheel 22 and the driversposition and being provided with pedalslSa. Within casing 83 and midway between end plates 82 is disposed a ring 91 secured to casing 83 by circumferentially spaced screws 88 havingtheir heads countershaft II as shown in Fig. 7. Rotor I02 is provided with a half clutch on the face of its hub adjacent the end of the casing, the same being adapted to engage with and mating half clutch I03a on a member i03 splined to and thus slidable on shaft II. For moving clittch member I00 the same is provided with an annular groove in which seats one end of a crank shaft I04 joumaled in one end plate 82 and extending through casing 83 and a slot in casing 86 and being provided within chamber 32q with a mutilated pinion I05. Pinion G05 meshes with a rack H16 secured to the outer side of casing 86 by spaced screws having their heads countersunk therein. It will be seen that upon rotation of casing 86 rack I06 will oscillate pinion I05 and crank shaft IN to move clutch member I02 longitudinally of shaft I'I. Clutch I00 can thus be readily engaged with or disengaged from the rotor Hill and this will connect or disconnect said rotor from shaft 'I'I. Another crank shaft lll'I is journaled in the other end plate 82 and has its crank end disposed in a groove in clutch member I03. Shaft I07 is connected to a mutilated pinion I 08 which meshes with a rack I 09 secured to the outer side of casing 86 by screws I I0 having their heads countersunk in said rack. It will be seen that rotation of casing 86 will oscillate pinion iilfl thus rotating crank shaft I01 and.

moving clutch member W3 longitudinally to connect shaft TI with shaft I02 or to disconnect said shaft therefrom. The disk portions or rotors II and W2 have secured therein adjacent the wall of casing 83 or pins or studs I I2. These pins have threaded ends screwed into said disk and are provided with collars I|I2dengaging said disks or disk-like portions. Said pins have an unthreaded portion adjacent said collar disposed in said disk. Pins H2 at the ends of casing 83 extend to and 'have reduced portions disposed in rings I '3 disposed in recesses in end plates 82. The pins H2 extend toward the center of casing 83 extend to and have reduced portions disposed in similar rings H3 disposed in recesses in central ring 81. Small screws i. extend through rings H3 centrally into pins H2 having their heads countersunk in said rings. Pins H2 are thus connected to the rings M3. The pins II 2 extend in opposite directions from the disk like portions of rotors m and M2 and are in staggered relationat opposite sides of said disk portions. The pins 2 I have joumaled thereon the vanes or plates III as shown in Figs. 3 and 4. Said vanes have projections 6a, the outer sides of which are provided with concave recesses adapted to'flt around the hub of the adjacent vane. The inner sides of said projections are provided with.convex surfaces andare adapted to ride on the periphery.

of a cam member H! which surrounds and is spaced from the clutch members I00 and I03 and 'the hubs of rotors IIII and I02 respectively. Said cam members as shown in Fig. '7 are four in numher and the-ones at the ends'of casing 83 are secured to rings 32 by circumferentially spaced bolts JI8 while the ones adjacent the center of casing 83 are secured to central ring 91 by similar bolts II8. As shown in Fig. 4 the wall of cam member In extends in a spiral path or eccentrically to shaft TI and said cam plate has an opening IIIa at the juncture of the innermost and outermost part of its wall. This opening extends from the chamber in which the vanes IIS are disposed to a chamber II9 within cam member Ill and this chamber II9 communicates at its ends through openings in end plates 32 with the chambers 321' and 329'. The chamber 321' communicates through a passage 32y with a passage 32w extending longitudinally of member 32 at one side thereof. Chamber 327' also communicates with passage 32w through a passage 322. A passage 30f in ring 30 cdhnects passage 3210 with passage 21m as shown in Fig. 2. It will be seen that there are two chambers H9, one at either side of central ring 91. The disk portions of members IM and I02 have openings therethrough so that the chambers H9 in the valve members at the opposite sides thereof are in communication. The vanes H6 at one side of ring 3'! namely the side at the right thereof as seen in Fig. '7, are disposed with their projections IIBa extending in one direction as shown in Fig. i and casings 83 and 85 have circumferentially spaced openings or ports 83?; and 85b respectively adapted to be brought into or out of register by rotation of casing 86. It will be seen that said ports or openings are at an angle to the radii of said casings and are directed toward the outer sides of the vanes H6. Said openings form in chest nozzles for directing fluid under pressure against said vanes. The vanes H6 at the other side of ring 9? namely the left hand side as seen in Fig. 7, are arranged to extend in a direction opposite to those at the right of the ring 9? as showii in Fig. 3. Casings 83 and 85 have the openings 83b and 86b therethrough at-the left of ring 91 as seen in Fig. 4 directed oppositely to those at the right of ring 9'! as shown in Fig. 3. Referring again to inlet member 53, the same is provided with a central partition 69d forming passages and 63c at either side thereof. .Housing 32 is provided with passages 32s and Mt communicating at their outer ends with passages 59b and Etc respectively and leading to chamber 321;. A plate I28 is disposed so as to overlie passages 32s and 323 and be moved with casing 85 to uncover one or the other of said passages as shown in Figs; 3 and 4. The ring or casing M is provided with an inwardly extending flange connected to the adjacent end flange of housing member 32 by the same of the circumferentially spaced bolts 13. Member It is provided with a, central hub Me in which is disposed a bearing I23 for shaft ii. It will be seen that bearings 36, I0 and I23 are of the ball bearing type. A bevelled pinion I20 is keyed to the end of the shaft W and meshes w th bevelled gear 20 which forms the main or driving gear for the differential gearing of the tractor axles driving wheels I9. The motor or transmission device TM is constructed and arranged to operate by liquid under pressure from pump P and to drive gear 20 in either direction. The further operation will be later described.

The motor SM comprises the housing member I33 which is of general cylindrical form and to which conduit 61 is connected as previously described. Houslng I30 has a flange at one end bolted by bolts I29 toa mating flange on casing 32. Housing I30 has an inlet opening I30a communicating with conduit 61. End plates I30b and I300 are bolted to the ends of housing I30 by circufnferentially spaced bolts I3I. End plate I30c has a central hub in which is secured a bearing I32 and end plate I30 has centrally secured therein a similar bearing I32, said bearings being shown as of the ball type. A shaft I33 constituting the rotor shaft of motor SM extends between and is journaled in bearings I32. A sealing ring I34 is disposed at the outer side of each of said bearings surrounding shaft I33 and end plates I30b and I300 are each provided with recesses at their ends surrounding shaft I33 and adapted to receive packing material I35. End plates I35 extend about shaft I33 and are bolted to the outer ends respectively of end plates I30?) and I300 being secured by screws I31 and acting to hold packing 535 in place. End plate I30c has an inner and inwardly extending annular flange I30d. End rings I38 are provided, one enga ing the inner flat surface of flange I30d and the other engaging end member I30b. Said rings have cylindrical peripheries and a casing I40 extends about saidperipheries and between said rings and is connected to said rings by the circumferentially spaced screws IiI having their heads countersunk in casing 10. Pins I62 extend into the ends of casing M0 and into end member I30b and flange I30d respectively. A casing I43 surrounds and flts snugly on casing I40, the same engaging end member I302; at one end and having an outwardly extending flange engaging end plate I300 and housing I30 at its other end. It will be noted that end members I30?) and I306: are provided with annular recesses in which are disposed the ends of casing M0 and M3. Said end flang of easing I43 has circumferentially spaced openings M341 therethrough which are adapted to be brought into and out of register with openings I30e in flange I30d of end member I300. A rotor M5 is keyed to shaft.

I33 by a plurality of circumferentially spaced keys. Said rotor M5 has a central disk-like portion having a cylindrical periphery engaging the inner side of easing I40. Said central portion has secured therein a plurality of circumferentially spaced pins or studs M6. Said studs hav ends I threaded into member M5 and have collars thereon engaging the side of member I45. Said studs have a short portion adjacent said collar which is unthreaded and disposed in member I45. Pins M5 project at opposite sides of member I05 and are arranged instaggered relation at opposite sides of said central portion. Pins I 46 extend to and have reduced portions disposed in rings I41 seated in annular recesses in the end plates or rings M0. Small screws I59 extend through said rings into the ends of pins I46. Pins I46 have journaled thereon vanes or plates I50. Vanes I50 have projections I50a, the outer sides of'which are provided with concave surfaces adapted to first against the hub of the adjacent vane. The inner sides of said projections have convex surfaces arranged to engage the periphery of a cam member I5I which surrounds and is spaced from the hub of rotor I45. There is a cam member IBI at each side of the central disk portion of rotor i 35 and said cam members are secured respectively to the end rings I38 by the circumferentially spaced bolts I52 having heads countersunk in said cam members. A chamber I53 is formed between said cam members and the hub of rotor I45. The walls and peripheries of cam members I5I are eccentric to shaft I33 and at the junction of the innermost and outermost positions have'openings I5Ia therethrough connecting chamber I53 with the chambers containing vanes 850. As shown in Fig. '7, the central portion of rotor I45 has openings therethrough so that the chambers I53 at each side of said central portion are in communication. End member I300 has an annular chamber I30 therein and this is in communication With chamber I53 through the central opening of ring I30. Shaft I33 projects beyond end member I30b and has keyed thereto a pulley I54. Casings I40 and M3 have at each side of the disk portion of rotor I05 sets of openings or ports I40b and I437). These openings as shown in Figs. 5 and 6, are disposed at an angle to the radii of said casings'and are directed against the outer side of vanes I50.

Said openings I40?) and M31) are adapted to be brought into and out of register by rotation of casing M3. It will be noted that the vanes I50 at one side of the disk portion of the rotor I 45 are arranged to extend in one direction as shown in Fi 6 while said vanes at the other side of said disk portion extend in the opposite direction as shown in Fig. 5. The openings I40?) and I43b are likewise arranged to extend in different direcstated, will be forced out through ports 450 into the chamber 21.2. The fluid being forced into chamber 2' may, if openings 217' and 45b are in register, pass through said openings at either end of casing 46 and will pass into the chambers 21c and 21h. From theselatter chambers as shown in Fig. 2, the fluid may again pass into tions. Casing M3 is'arranged to be oscillated and for this purpose a rack I56 is secured to the outer side of said casing by screws I51 having their heads countersunk in said rack. A pinion I50 meshes with rack I56, the same being secured to a shaft I59 extending centrally through a boss E3011. of housing I30, the same having a nut I60 on its outer end. An arm iIiI is secured to the outer end of shaft I53 beneath nut I60, the same having pivotally secured to its other end a link I02 extending to a point adjacent the operator for convenient manipulation by the operator and having a handle i02a secured thereto; The link IBI has a portion moving between scales I63 which are provided with graduations which may be designated by numbers or letters to indicate the position of link I02. Casing I30 has a boss i301. on its lower side to whichis connected by bolts I65 the conduit 00 which is also connected to the casing 27 of the pump P as shown in Fig. 9.

The casing I30 and its flange connecting the constructed and arranged to mate with the flange on member I30.- An elbow connection I12 will be provided whichwill be connected to casing I30 as is conduit 61. A member I13 will be provided which will extend to and be connected to conduit 01. .Another conduit I will replace'conduit 53 and be connected to the bottom of housing I and will extend to and be connected to housing 21 of the pump P. The pulley I54 will be transferred with the whole assembly of casing I30 and parts thereof. The pulley I54 can thus be disposed either-at the side of the tractor or at the rear thereof.

valve 53 and the fluid will thus merely be circulated in the pump. If the casing 46 is rotated by means of pinion 58 and rack 50 through movement of link 63 and arm 6| to bring the openings 217 and 45b out of register, one of the openings 2In or 210 will be opened. Assuming opening 2In is open to chamber 212' as shown in Fig. 9, the fluid will pass out through said opening into conduit 57 and will be forced therethrough into the chamber in casing I 30 between the inner wall of said casing. and. casing I43. From this chamber the fluid will pass through openings I43b and Ib which as before described, act as nozzles for directing the liquid against the vanes I50. The liquid being directed against said vanes rotor I is rotated and the same revolves with vanes 1150 thereon,the'latter riding with their convex surfaces on cam member I5I. It will be seen that a seal is provided by these convex surfaces against cam I5I until the opening I5Ia is reached, when the liquid will pass through said opening into chamber I53 and will pass therefrom through one of the rings i30 into chamber I30f and will pass therefrom through passage 32 into passage 3221: and from there through passage 30b in ring 30 and through passage 21p and to passages 21c and 2171. where it again passes into chamber 53b of pump P. The revolution of rotor I45 drives shaft I33 and the service pulley I is thus rotated for whatever service is desired. As described, the casing I43 can be oscillated by rack I56 and pinion I53 to bring the openings I43a and I30e into register. The fluid-will then pass from conduit 61 into the chamber between casings I 30 and I43 through openings I43a and I 30c into chamber -I30,f and then back to the pump through pas- .sages 32y, 32w, 30b and 212). The rotor I45 can thus be rotated with the fluid under pressure or the fluid can merely be bypassed in casing I30.

vIf the openings or passage 210 is uncovered by plate 06 and the passage 2m is covered by plate 35 the fluid from pump P will be forced through conduit 68 and will pass into inlet member 69 and into the passages 32s and 32f. .Assuming that the passage 3213 is uncovered by plate [H as shown in, Fig. 4, the fluid will pass into chamber 32q between the-wall of housing 32 and casing 85. The fluid will then pass through the openings 33b and 86bit these are in register as shown The operation of the tractor and parts above described is as follows:

The motor 24, o'f the tractor will be operated as usual and th s being directly connected to-the pump P the latter will be driven. 'The pump P p annular chamber in which vanes 52 move and as in Figs. 4 and 7.. These openings or passages act as nozzles and direct the fluid against the outer sides of the vanes M6. Rotor I02 is thus rotated and will be in engagement and willdrive clutch member I03 thus driving shaft 11. The fluid acting against vanes I I 6 as stated rotates rotor I02 and said vanes form a seal against the periphery of cam member I I1 until the opening I I Ia is reached when the liquid will pass n t chamber II9 within cam Ill. The fluid. will then pass longitudinally of said chamber into the chamber 32 of end member 32c. From here it will pass into passage 32w and will pass through passage 30b into passage 21p and'back to the pump. Rotation of rotor I02 and clutch member I03 as stated rotates shaft 11 in one direction and differential gear 20 will be rotated to drive the tractor wheels is. The operator by movement of links 95 can oscillate casing 8t and bring the passages 86b and 8317 at the other side of ring 91 into register. This position is shown in Fig. 3 and the rotor illi will then be driven and this will at that time be clutched to clutch member I and will drive shaft ll in the direc tion opposite to that in which it was driven by rotor I02 and clutch member I03. It will be understood that when the operator oscillated casing 86 the pinions I86 and ms were rotated, thus oscillating the crank shafts IM and M1. This disconnected. clutch member I03 from rotor I02 and connected clutch member I00 with rotor ifil. The said oscillation of casing 8% also moved plate I2l to uncover passage 32s and cover passage 3212 as shown in Fig. 3. The casing 85 can be placed in midposition where'the openings dda'will be in register with openings 32p. When in this position the liquid will pass from chamber 32g through the said latter openings into passage 32 j and will merely be bypassed. Neither of the rotors it! or its will then be driven. The clutches on said rotors will then be only partly engaged. In changing the direction of rotation of the transmission motor it must be moved through the bypass position.

It will thus be seen that the motor or transmission mechanism TM can be driven in either direction at will and forward and reverse speeds of the tractor can thus be had; The openings 83b and 86b can be brought more or less into register as desired and the desired speed of rotation of shaft H can be thus directly controlled by the operator by moving the links 95. Any speed from zero to maximum speed and full power can be had in driving the tractor in either direction by movement of links e which are under the direct control of the operator. The motor SM can be similarly controlled and any desired speed of pulley HM can thus be secured.

The pump is provided with two openings 6341 thus giving more volume of fluid. In the service motor and transmission motor only one opening is provided in the cam of the rotor as it is desired to get more pressure area. It will be seen that the internal combustion motor of the tractor can be operated and the pump driven thereby. The fluid can be bypassed in the pump if desired so that no fluid under pressure will be supplied to the service motor or the transmission motor. The fluid under pressure can be supplied to the transmission motor and the driving of the tractor wheels and the movement of the tractor can then be controlled by either driving the shaft. of the transmission motor in either direction or bypassing the fluid'ln the transmission motor. The full power of the internal combustion motor and pump can thus be had and any desired torque can be applied to the tractor wheels through the transmission motor. The movement of the tractor can thus be controlled with the pump being driven either by bypassing fluid in the pump or by controlling the transmission motor. The service motor can likewise be either driven with the fluid from the pump or the. fluid can be bypassed therein. The internal combustion motor can thus be speeded as desired and only the desired speed given to the tractor wheels or to the service pulley. The differential gearing for the wheels can thus be moved at quite a low speed while the internal combustion motor is running at full speed.' With the service motor attached to the rear end of the tractor as indicated in Fig.

1, a universal joint could be substituted for pulley I54 and coupled to a harvester for driving the latter. The harvester could thus be operated by the transmission motor and progressed or drawn along the ground at the same time by the tractor. At this time some fluid under pressure would be supplied to both the service motor and the transmission motor.

From the above description it will be seen that I have provided a novel and extremely enlcient combination for a tractor, The structure can be made very compact and as stated, can be applied either to new tractors or to tractors which have been used. A great flexibility is given to the control of the tractor and results can be secured which have heretofore been impossible. It will be obvious that the device will have a high degree of utility for the purpose intended.

It will, of course, be understood that various changes may be made in the form, details, arrangement and proportions of the parts, without departing from the scope of applicants invention, which generally stated, consists in a device capable of carrying out the objects above set forth, in the parts and combinations of parts disclosed and defined in the appendedclaims.

What is claimed is:

1. A tractor with fluid drive and transmission having a frame, driving wheels, a differential gearing for driving said wheels, an internal combustion motor mounted at the forward part of said frame comprising a rotating driving element, a pump having a drive shaft directly connected to said element, a fluid operated motor driven by fluid under pressure from said pump, a conduit connecting said pump and fluid operated motor for supplying fluid under pressure to said fluid operated motor, said motor having portions to which liquid is delivered to rotate of said motor to and from said shaft respectively and means connecting said shaft and said diil'er-,

ential gearing.

2. A tractor with fluid drive and transmission having a frame, driving wheels, a differential gearing for driving said wheels, an internal combustion motor mounted at the'forward part of said frame comprising a rotating driving element, a pump directly connected to said element, a fluid operated motor driven by fluid under pressure from said pump, a conduit connecting said pump and fluid operated motor for supplying fluid under pressure to said motor, means for directing fluid to said motor for driving the same in opposite directions, a second conduit connecting said pump and motor for returning fluid to said pump, said fluid operated motor being located between said pump and said differential gearing, a shaft connected to said differential gearing and clutches for connecting and disconnecting said shaft and motor for driving said shaft in opposite directions respectively.

3. A tractor with fluid drive and transmission having a frame, driving wheels, a diflerentlal gearing for said wheels, an internal combustion motor mounted at the forward part of said frame comprising a rotating driving element, a pump having a driving shaft connected to said driving element, a bearing for said shaft at the end of said pump adjacent said element, a bearmotor and differential gearing, a bearing for said second mentioned driving shaft in said casting and a pinion secured to said last mentioned driving shaft adjacent said last men tioned bearing connected to said differential gearing.

4. A tractor with fluid drive and transmission having a frame, driving wheels, an internal combustion motor mounted on said frame and a differential gearing for driving said wheels, a pump connected to said motor, a fluid operated motor driven -by fluid under pressure from said pump, a conduit connecting said pump and fluid operated motor for supplying fluid under pressure to said motor, a conduit connecting said pump and fluid operated motor for returning fluid to said pump, a second fluid operated motor driven by fluid under pressure from said pump, a conduit connecting said pump and second fluid operated motor for supplying fluid under pressure thereto, a conduit connecting said second fluid operated motor and pump for returning fluid to said pump, a service pulley driven by said second fluid operated motor, a shaft driven by said first fluid operated motor connectedto said differential gearing and means for directing fluid from said pump to, either of said fluid operated motors.

5. A tractor with fluid drive and transmission having a frame, driving wheels, a differential, gearing for driving said wheels and an internal combustion motor mounted at the forward part of said frame having in combination. a casing for said motor, a pump having a housing, an adapter member between said motor casing and housing, means for securing said motor casing,

adapter member and housing rigidly together,-

a fluid operated transmission motor for driving said differential gearing having a housing, means rigidly connecting said latter housing and said pump housings, a differential housing and an adapter member between and rigidly secured toisaid latter housing and said transmission motor housing. I

6. In a tractor with fluid drive and transmission. said tractor having a frame, driving whee s. a differential gearing for driving said whee s. an internal combustion motor mounted at the forward part of said frame, the combination of a fluid pump driven by said motor having a housing with inlet chamber, a passage in said housring at one side thereof with which'said chamber communicates, a fluid operated transmission motor connected to said pump to be driven by' fluid under pressure therefrom having a housingwith outlet chambers at its ends and a discharge passage at one side thereof extending longitudinally thereof, said last mentioned passage being connected to saidflrst-mentioned passage of said pump housing, a shaft driven by said transmission motor and a, gear on said shaft for driving said'difl'erentlal gearing.

7. In a tractor with fluid drive and transmission, said tractor having a frame, driving wheels, a 'differential gearing for driving said wheels, an internal combustion motor mounted at the forward part of said frame, the combination of a fluid pump driven by said motor, a fluid operated transmission motor, an inlet conduit connecting said pump and transmission motor, a return conduit connecting said pump and transmission motor, a fluid operated service motor, an inlet conduit connecting said pump and said service motor, a return passage connecting said service motor and pump, means for directing fluid from said pump to either of said motors including a member located at one side of said pump and transmission motor and extending to the drivers position, means for changin the rotation of said transmission motor located at the same side of said servicemotor and extend ing to the operator's position and a driving con nection between said transmission motor and said differential gearing.

8. In a tractor with fluid drive and transmission, said tractor having a frame. driving wheels, a differential gearing for driving said wheels. an internal combustion motor mounted at the forward part of said frame, the combination of a fluid pump driven by said motor, said pump having a housing, a member between said motor and housing, means rigidly connecting said member and said motor ,and housing together, a fluid operated transmission-motor having a housing, means rigidly connecting said pump housing and said housing of said transmission motor, a service motor having a housing, means rigidly connecting said latter housing to one side of said housing of said transmission motor, an inlet conduit extending from said pump to I .said transmission motor and being rigidly connected to said pump and transmission motor, an inlet conduit for said service motor extending from said pump to said service motor and being rigidly connected to said pump housing and service motor housing, said service motor housing, transmission motor housing and pump housing havingconnecting passages at one side thereof forming a return passage to said pump. a service pulley driven by said service motor and a shaft driven by said transmission motor connected to said differential gearing for driving the same.

9. In a tractor with fluid drive and transmission. said tractor having a frame, driving wheels, a differential gearing for driving said wheels, an internal combustion motor mounted at the forward part of said frame, the combination of a fluid pump driven by said motor, said pump having a housing with outlet openings at opposite sides thereof, a'fluid operated transmission motor having a housing rigidly connected to said pumphousing, a conduit rigidly dmnected to said pump housing and to said transmission 'motor housing,,the same communicating with one of said outlet openings of said pump and forming an inlet conduit for said transmission motor, a fluid operated service motor having a housing rigidly connected to said transmission motor. housing,.a conduit rigidly connected to I said pump housing and'to the housing of said seryice motor, forming an inlet conduit therefor and communicating with the other outlet opening of said pump, said housings having therein communicating passages for returning fluid to said pump from said service motor and transmission motor. a shaft driven by saidtransmission motor and geared to said differential gearing and a service pulley driven by said service motor.

10. In a tractor with fluid drive and transmission, said tractor having a frame, driving wheels, 2. difierential gearing for driving said wheels and an internal combustion motor mounted atthe forward part of said frame, the combination of a fluid pump driven by said motor, a fluid operated transmission motor driven by fluid under pressure from said pump, a service motor driven by fluid under pressure from said pump, said pump having an oscillatable member for directing fluid to either said service motor or transmission motor and means for oscillating said member including a member extending to the driver's position.

11. The structure set forth in claim 10, said transmission motor having a revoluble casing for changing the direction of rotation thereof, and means for oscillating said member to change the direction of rotation including a member extending to the drivers position.

12. A tractor with fluid drive and transmission, said tractor having a frame, driving wheels, a differential gearing for driving said wheels and an internal combustion motor mounted on said frame, the combination of a fluid pump driven by said motor, a fluid operated transmission motor having a driving shaft and a plurality of rotors, means for directing said fluid for rotating said rotors in opposite directions respectively and means for connecting and, disconnecting said rotors respectively to said shaft for rotating the same in opposite directions and a gear on said shaft for driving said differential gear ing for giving forward and rearward speeds t said tractor. 1

13. A tractor with fluid drive and transmission, said tractor having a frame, driving -wheels, a differential gearing for driving said wheels and an internal combustion motor mounted on said frame, the combination of a fluid pump having a driving shaft, directly connected to and driven by said motor and a fluid operated transmission device having a plurality of rotors driven by fluid under pressure from said pump, means for directing-said fluid to drive said rotors in opposite directions, a shaft for driving said difierential gearing and means for connecting and disconnecting said rotors-respectively to and from said shaft, said shafts being in axial alignment.

14. In a tractor with fluid drive and transmission, said tractorv having a frame, driving wheels, a differential gearing for driving said wheels and an internal combustion motor mounted at the forward part of said frame, the combination of a fluid pump driven by said motor, a fluid operated transmission motor having a shaft geared to said differential gearing for driving the same, a fluid operated service motor, a service pulley driven-by said service motor, a member for controlling said pump movable to positions respectively to supply fluid to said transmission motor, to supply fluid to said service motor and to shut off suppLv of fluid to both of said motors and bypass said fluid within said pump, and means for moving said member to either of said three positionsincluding a member extending to a point adjacent the operators position to be operated by the driver of said tractor.

asaaaes 15. In a tractor with fluid drive and transmission, said tractor having a frame, driving wheels, a differential gearing for driving said wheels, and an internal combustion motor mounted at the forward part of said frame, the

combination of a fluid pump driven by said motor, a fluid operated transmission motor having a driving shaft connected to said differential gearing, a member movable to positions to shut ofi supply of fluid from said pump to said transmission motor and to supply fluid thereto.

f a member of movable to positions to operate said transmission motor to rotate said shaft in one direction, and to operate said transmission motor to operate said shaft in the opposite direction and to bypass fluid in said transmission motor without rotating said shaft.

16. In a tractor with fluid drive and transmission, said tractor having a frame, driving wheels, a differential gearing for driving said Wheels and an internal combustion motor mounted at the forward part of said frame, the combination of a fluid pump driven by said motor, a fluid operated transmission motor, a fluid operated service motor, a pulley driven by said service motor, means for supplying fluid under pressure from said pump to either said transmission motor or saidservice motor or for bypassing fluid within said pump, means for driving said service motor with fluid supplied under pressure from said pump or for bypassing said fluid within said service. motor and means for driving said transmission motor with fluid under pressure supplied from said pump or for bypassing said fluid within said transmission motor.

17. In a tractorhaving a frame, driving wheels, 'a differential gearing for driving said wheels, and an internal combustion motor mounted at the forward part of said frame, the combination of a fluid pump driven by said motor, a fluid operated transmission motor havin a shaft adapted to be connected to said differential gearing and having a frame with an annular flange at one side thereof, means for supplying fluid from said pump to said motor, a member at the rear end of said first mentioned frame having an annular flange at its rear end, a fluid operated service motor having a pulley driven thereby, said service motor being constructed andarranged to be connected to either of said flanges and means for supplying fluid to said service motor from said pump.

- erator.

by said motor, a fluid operated transmisison mo-- tor having a shaft adapted to be connected to said differential gearing, means for supplying fluid'from said pump to said motor, a fluid operated service motor, a pulley driven by said service motor, means for supplying fluid under pressure from said pump to either said trans- 'mission motor or said service motor, control means for controlling the speed and direction of rotation of said transmission motor, control means for controlling thespeed ofsaid service motor and actuating means for said control means extending to adjacent the operator's position for convenient manipulation by the op- JOSEPH o. 

